Original Publication Date: 1983-Mar-01
Included in the Prior Art Database: 2001-Oct-10
It is useful in some apparatus to have a mechanism capable of rapid but precise changes in radius. Examples of such apparatus include devices for forming circular shapes, machines for sealing lids on semiconductors and other containers, and optical and radar reflective and refractive components of variable circular shape. Prior approaches to providing changes in radius for such apparatus have in- cluded use of drill chucks, lathe collets, rolling container sealers and optical servo mechanisms. However, none of these apparatus are particularly rapid or precise.